GEOGRAPHICAL REFERENCES THE WORLD FACTBOOK MAPS & REFERENCES NATIONAL ATLAS OF THE UNITED STATES -- USGS NATIONAL GEOGRAPHIC THE THESAURUS OF GEOGRAPHICAL NAMES U.S. GAZETTEER WORLD LECTURE HALL - Univ. of Texas
GEOGRAPHICAL REFERENCES
THE WORLD FACTBOOK
MAPS & REFERENCES
NATIONAL ATLAS OF THE UNITED STATES -- USGS
WORLD LECTURE HALL - Univ. of Texas